presby environmental, inc. · 2015. 12. 19. · advanced enviro-septic® treatment system ....
TRANSCRIPT
Advanced Enviro-Septic® Treatment System
Functional and Theoretical Overview
Introduction: The Advanced Enviro-Septic
® Treatment System (AES), available exclusively from Presby Environmental (PEI),
is an innovative, alternative onsite wastewater treatment system that utilizes natural, non-mechanical processes to treat and disperse effluent that has received primary treatment in a conventional septic tank. Expected effluent quality after treatment in an AES System meets US EPA Tertiary Treatment guidelines, NSF Standard 40 Class I requirements and BNQ (Bureau de Normalisation du Quebec) Secondary and Advanced Secondary requirements.
How AES treats wastewater: The Advanced Enviro-Septic
® Wastewater Treatment System in essence creates a self-sustaining, self-
regulating biological ecosystem which is highly effective at purifying effluent. The bacterial population within the system adjusts as it is exposed to cycling aerobic and anaerobic (wet and dry) conditions. The aerobic and anaerobic bacteria populations automatically adjust based on what they are “fed” (the waste that is introduced to the system for processing) and the amount of oxygen present in the system. The biomat (a microscopic layer created by the waste-products of anaerobic bacterial activity) is responsible for treating the wastewater and regulating the rate at which fluid moves through the system. Slowing down the liquid enables the bacteria (both aerobic and anaerobic) the time it needs to digest the waste materials (suspended solids) in the effluent. The aerobic bacteria digest the biomat, enhancing its permeability and preventing it from clogging. So while anaerobic bacteria (which exist in the part of the pipe that is regularly wet and oxygen free) are continually building the biomat, the aerobic bacteria are continually eating away at it, creating a natural balance that results in passive, effective, long-term wastewater treatment. The result is a healthy biomat that is not subject to clogging and which regulates the passage of fluid so that it is not too fast (which would release untreated wastewater into the environment) nor too slow (which would potentially create a hydraulic overload). Physical description of proposed technology: (Please refer to the attached cross-section and AES System diagram.) The AES system is designed to provide combined treatment and dispersal of wastewater that has received primary treatment in a septic tank. Effluent travels from the septic tank to the treatment system by gravity or, if necessary, using a pump system to gain elevation. AES is a passive/non-mechanical treatment system that does not require electricity, pressure distribution, mechanical devices or replacement media. The AES system develops a multi-stage, permeable, self-regulating biomat that is highly effective at purifying wastewater and protects receiving soils from clogging. The primary system component is the patented AES pipe, which is a high-density plastic pipe that is ridged and perforated; a skimmer tab extends inwardly from each perforation. A layer of geo-textile fabric (Bio-Accelerator
®) partially surrounds the outer surface along the bottom the pipe. A mat of coarse, randomly-
oriented plastic fibers completely surrounds the outside of the pipe, and another layer of geo-textile fabric surrounds the pipe circumference and is stitched together to hold the fiber mat in place. The finished product is approximately 12 inches in diameter; AES pipe comes in ten foot sections which are joined together with couplings and connected at each end using offset adapters or double offset adapters which have openings used to make connections using 4 in. PVC pipe. All components are extremely durable, lightweight for ease of transport and handling, and non-biodegradable. The system is installed within a bed or trench of specified System Sand which facilitates gas exchange and controlled infiltration into underlying soils. All systems include ventilation to assure aerobic conditions are maintained.
800-473-5298 www.PresbyEnvironmental.com PRESBY ENVIRONMENTAL, INC.
TECHNICAL BULLETIN
2
Advantages over conventional technology/reduction of possible risks: Repeated third-party testing confirms the System’s ability to significantly reduce CBOD5, fecal coliforms and TSS compared to conventional technology. In addition, the AES system maintains a stable pH in the range of 6.5 to 8.0, providing the ideal conditions for aerobic bacterial processes. AES provides treatment of wastewater prior to releasing it into the ground, reducing risks to public health, surface and ground waters, and the environment. AES has a proven ability to develop a treatment biomat in as little as three weeks after the system is first put into use (or during periods of intermittent use), minimizing any discharge of untreated effluent during the start-up period. Advanced Enviro-Septic
® protects the underlying soils from clogging--facilitating infiltration,
preventing leachate from surfacing, and extending system life. The AES components are highly durable and non-biodegradable; in addition, the system is entirely passive and uses no mechanical devices. Once properly installed, there is virtually nothing in the system to break down, wear out or malfunction, significantly reducing the possibility of accidental discharge of inadequately treated effluent. Ease of maintenance prevents system malfunction associated with lack of proper system maintenance. The effect of the proposed technology on the area of land required for operation: The AES system requires a fraction of the land area needed for a pipe and stone system (40 to 70% less depending on state regulations). Since the system does not rely on the underlying soils to treat wastewater (like pipe and stone and chamber leaching systems do), and since the system prevents the bacterial surfaces and the underlying soil from clogging, it can be both smaller and closer to restrictive features. Bio-Accelerator
®
protects the soils and groundwater from contamination by filtering out additional solids from effluent, enhancing and accelerating treatment, facilitating quick start-up after periods of non-use, providing additional surface area for bacterial growth, promoting even distribution, and further protecting outer layers and the receiving surfaces so they remain permeable. The System’s ability to be installed in a sloping configuration also preserves the natural terrain. Since the System preserves the underlying soils, a “reserve area” is not required since a replacement system can be installed in the same location. Minimum Site Requirements for an AES onsite system: In order to be suitable for an AES onsite system, the site must have a minimum of 12 in. of unsaturated soil below the AES System and System Sand bed (either naturally occurring soil or suitable fill material). We require a minimum of 18 in. separation distance from the bottom of the AES pipes to the seasonal high water table or restrictive layer; this 18 in. includes a minimum of 6 in. of System Sand installed directly below the pipes. Since an AES System can be 40 to 70% smaller than a conventional system, and since it does not require a replacement area, AES provides a realistic solution for small or odd-shaped lots that otherwise could not accommodate an onsite system. (Note: state regulations typically dictate minimum System Sand bed sizes). Surface diversions (grading, swales) are installed upslope of the System to redirect surface water flows. The following Theoretical Overview explains the factors to be considered in designing/installing an AES System and their importance in terms of system function.
Prepared by,
Presby Environmental, Inc. Dated: June 29, 2010 143 Airport Road Whitefield, NH 03598 (800) 473-5298 [email protected] www.presbyenvironmental.com
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CLUSTER SYSTEMS FOR PASSIVE COMMUNITY
TREATMENT WITH DE-NITRIFICATION CASE STUDY: Blodgett Landing Community Treatment Plant
Lee W. Rashkin
As technology improves, “cluster” or “STEP” systems are becoming an increasingly popular
solution to accommodate the sanitary needs of growing populations worldwide. These community
systems are designed to treat the wastewater from sections of a city, town, village, sub-division, resort
area, camp, or other groups of homes and businesses. This strategy offers lower capital investment and
on-going costs than municipal treatment systems. These systems provide a higher level of water quality
protection, support the local water supplies, can easily accommodate growth, require less infrastructure,
and make it easy to employ water reuse techniques. With the incorporation of passive technology,
communities are achieving these benefits with very little energy consumption, maintenance, chemicals, or
additives, resulting in significantly reduced upfront and operational costs.
CASE STUDY: Blodgett Landing Community Treatment Plant
The Blodgett Landing Treatment Plant is a 50,000 GPD facility that provides passive advanced
treatment and dispersal with de-nitrification. The town of Newbury, New Hampshire decided to upgrade
and expand their wastewater treatment facility in 2010. There were many problems that needed to be
solved, but the most difficult was finding a solution within their limited budget that exceeded treatment
levels while being easy to operate and maintain. The engineering firm selected Presby Environmental’s
Enviro-Septic® technology due to its minimal upfront and ongoing costs as well as its proven treatment
levels. As of August 11, 2014, this system is achieving the following treatment levels: BOD = 6 mg/L,
TSS = 5.04 mg/L, TN 7.14 mg/L, TKN = 0.89 mg/L, Fecal Coliform = 3,632 MPN/100ml (see Table
1). The town of Newbury was very impressed with the effectiveness of the system, stating:
“Since it was installed in 2011, the system has
consistently exceeded the required effluent treatment
levels. The upfront cost saving of this technology
along with its ability to perform with minimal
ongoing cost and maintenance makes it truly
exceptional in the world of large-flow wastewater
treatment.”
~Plant Manager, Tim Mulder
Figure 1
The Blodgett Landing Treatment Plant is in the southwestern part of New Hampshire, as seen in Figure 1.
This part of the state is known for its state parks, beautiful lakes, and outdoor recreation. In 2001, the
town of Newbury started detecting elevated nitrogen levels within the effluent and ground water; it was at
that time they decided to upgrade the Treatment Plant. This initial upgrade included lining the original
sand filters so they could catch the effluent and pump it into a recycling tank. 50% of that effluent was
recirculated to the Imhoff tank where the organic material aided in reducing the nitrogen and ammonia.
Unfortunately, they still had issues with attaining treatment in the winter months as well as other long
term problems. In 2010, they decided on a permanent solution. The town identified the following four
major issues: First, they had issues with winter operation. They would routinely have parts of the system
freeze, hindering its operation. Second, the cold weather was also affecting the treatment levels. Third,
increased de-nitrification requirements. Finally, with a growing community, the system was not large
enough to deal with the increased capacity. This left the town with a unique set of problems and a difficult
decision to make.
After investigating many options, the town ultimately choose Presby Environmental’s Enviro-Septic®
Technology for their treatment needs. The Enviro-Septic® System is a passive wastewater treatment
system that is tested and proven to remove up to 99% of wastewater contaminants such as BOD, TSS,
TN, TKN, and Fecal Coliform. Enviro-Septic® uses patented fabrics and fibers to naturally establish
multiple bacterial treatment environments throughout the system that break down and digest wastewater
contaminants without the use of electricity or additives. Enviro-Septic® Systems have proven effective in
cold weather which makes them ideal for this location. The warm effluent combined with the biological
process that takes place within the pipe generates enough heat to keep the system from freezing. With
systems in Africa, Europe, Southeast Asia, Canada, Mexico, and the US, the system is time-proven in
both cold and warm climates. The Blodgett Landing Treatment Plant is designed as a re-circulating
system with the patented Multi-Level™ configuration handling flows ranging from 2,500-88,000GPD.
Treatment Chain
After the wastewater is received, it goes through an initial screening and then proceeds to one of two
Imhoff tanks where sedimentation and separation occurs. After the Imhoff tank, the effluent then proceeds
to an equalization tank before it is dispersed to one of the four passive Enviro-Septic® treatment beds.
(See Figure 3 at the end of this paper for the treatment bed specifications.)
Each treatment bed measures approximately 90 feet long by 50 feet wide. The beds consist of 48 rows of
pipe that are each 86 feet long. That means there is approximately 4,100 feet of pipe per bed or roughly
16,400 feet for the entire system. At 50,000 GPD the 16,400 feet of Enviro-Septic® pipe treats roughly 3
gallons per linear foot per day. With an impressive 25 sq ft of surface area per linear foot of Enviro-
Septic®, you have over 400,000 ft2 or over 9 acres of bacterial surface area in this system. A large amount
of bacterial surface combined with sufficient oxygen and other patented features allows for the high levels
Figure 2
*Sample Location
of treatment. These treatment beds are lined to capture the treated effluent. Once captured, the treated
effluent is then pumped into a recycling tank. 75% of the treated effluent is then sent back through the
Imhoff tanks via recirculation pumps and the rest is dosed into the dispersal area. As the treated effluent
that is sent back to the Imhoff tanks goes anaerobic, the organic material present acts as a carbon donor in
the denitrification process. Additional denitrification then takes place in the anoxic zone of the Imhoff
tank. Figure 4 at the conclusion of this paper shows a diagram of the system’s layout.
One of the main reasons why the Blodgett Landing Treatment Plant was upgraded was to increase the
level of treatment. At first, the town of Newbury thought it was going to be too expensive to meet the
treatment levels set by the state of New Hampshire. That is because most municipalities employ a
mechanical treatment process that can be costly and requires routine maintance and replacement parts.
There is a movement in the large flow industry to find a passive treatment process that can provide the
treatment levels required by regulators. The Enviro-Septic® Technology is being adopted globally as an
affordable option that has minimal upkeep and maintenance. The following test results are averages of
samples taken at the re-circulation chamber.
Testing Parameters
BOD TSS TN TKN Fecal Coliform
Test Results
6.0 mg/L 5.04 mg/L 7.14 mg/L 0.89 mg/L 3,632
MPN/100ml
The town of Newbury has been very pleased with the performance and operation of this system. Plant
Manager Tim Mulder said, “[Enviro-Septic®] is truly exceptional in the world of large-flow wastewater
treatment.” With minimal ongoing costs this system will save the town a lot of money over the next few
decades, while proving the highest level of environmental protection. This project is a great example of
how dencetralized treatment systems can provide a passive, affordable, and reliable solution for
residential, commercial and community use.
*Samples taken at
re-circulation tank Table 1
Figure 3
- 1 -
AES Technology: Testing, Certifications & Approvals Introduction: Advanced Enviro‐Septic® (AES) and its predecessor product, Enviro‐Septic® (ES), have been subjected to numerous testing protocols since being introduced to the onsite septic industry in 1995. Through third‐party testing, AES’s treatment processes, efficient dispersal, and reliable, maintenance‐free operation have been quantified and proven. With the number of systems installed world‐wide approaching 250,000, the effectiveness of AES and ES systems has been confirmed in the field. Our systems demonstrate a minimal failure rate and exceptional system life, while using no energy and needing no special maintenance or replacement parts.
Patented Technology: AES and ES are proprietary products invented by David W. Presby and manufactured exclusively by Presby Environmental, Inc. (PEI) of Whitefield, New Hampshire. The technology has been the subject of numerous US and International patents, with other patents pending. PEI is committed to ongoing product development in order to maximize the performance of our systems, focusing on methods that are cost‐effective for the consumer and do not require electricity, replacement parts or special maintenance in order to provide exceptional environmental protection. All components are non‐biodegradable and are made using recycled plastic to the fullest extent possible while retaining durability and H10/H20 load bearing capacity. Our manufacturing facility is audited regularly by NSF International (“NSF”) and Bureau de Normalization du Quebec (“BNQ”) to assure product quality and consistency.
Wastewater Treatment, Third‐Party Test Results:
AES Technology has consistently produced treated wastewater that exceeds EPA’s Secondary Treatment levels (CBOD5 and TSS less than 30 mg/L.) and Tertiary Treatment levels (CBOD5 and TSS reduced to less than 10 mg/L.) AES achieves removal of contaminants comparable to ATU’s and mechanical devices, while also providing infiltration and dispersal in the same footprint. No other passive onsite system has been subjected to more testing or obtained such exceptional results. Full reports are available documenting the results of the studies summarized below.
Advanced Enviro‐Septic Certifications
Certification Date Related Testing System Tested Certified Systems
ANSI/NSF Standard 40 Class I Cert. # 3U460‐01
2009 BNQ* Annex A (2005‐2006) Report No. 30825‐035‐A
Full Size AES 12 in. System Sand 6 months including stress testing
SPD† & CTD◊
Models 450 to 1500 gpd (Residential)
BNQ* Class II Cert. # 890
2007 BNQ* Annex A & B (2005‐2006) Report Nos. 30825‐035‐A & 30825‐036‐A
Full Size AES 12 in. System Sand 12 months including stress testing
Stand‐alone Class II Treatment Systems for Isolated Dwellings
BNQ* Class III Cert. #890
2009 BNQ* Annex A & B (2007‐2008) Report Nos. 30825‐047‐A & 30825‐049‐A
Full Size AES 24 in. System Sand 12 months including stress testing
Stand‐alone Class III Treatment Systems for Isolated Dwellings
European Union EN12566‐3 Appendix B
2010 Cebedeau Bench Test Liege, Belgium
Full Size AES 12 in. System Sand 11 months including stress testing
EU
* BNQ – Bureau de Normalization du Quebec, Canada † SPD – Single Point Discharge ◊ CTD—Combined Treatment & Dispersal (Bottomless)
- 2 -
NSF International is an independent, non‐profit organization recognized throughout the world as a leader in standards development and product certification. Their mission is to protect and improve human health on a global scale by certifying food, water and consumer products. To learn more about NSF standards and their certification programs, visit www.nsf.org. NSF is accredited by the American National Standards Institute (ANSI). ANSI/NSF Standard 40 sets performance standards for onsite wastewater treatment devices for residential systems with hydraulic capacities from 400 to 1500 gallons per day. In order to receive Standard 40 Class I certification, systems are tested for a minimum of six months following NSF’s protocol and must achieve exceptional effluent quality. AES was tested at the Bureau de Normalisation du Québec (“BNQ”) and received simultaneous NSF‐40 and BNQ Class II certification. BNQ is accredited by the Standards Counsel of Canada. BNQ Certification requires an additional six months of testing to confirm system performance and reliability in all weather conditions. AES is one of only 4 products in its field that have been BNQ Certified, achieving both Secondary (Class II) and Advanced Secondary (Class III) certifications. AES is used in NSF‐40 Certified systems and in non‐certified systems pursuant to individual state approvals.
BNQ ANNEX A RESULTS SUMMARY
Testing of Full Sized AES System per ANSI/NSF Standard 40 and BNQ NQ 3680-910 10/30/05 - 04/26/06
(Resulted in NSF 40 Class I Certification & BNQ Class II Certification) Loading Rate 2.4 gallons/day/foot of pipe + Stress Testing
Parameter Measured
Average Range BNQ Class II Standard
NSF-40 Class I Standard
pH 7.2 7.0 to 7.5 n/a 6.0 to 9.0
CBOD5 8 mg/L <2 to 22 mg/L <25 mg/L <25 mg/L
TSS 4 mg/L <2 to 15 mg/L <30 mg/L <30 mg/L
Color None <1 color unit n/a None
Odor None “Non-offensive” n/a Non-Offensive
Oily Film/Foam None Not visually detected n/a Not visually detected
Noise None* None* n/a < 60 dbA
BNQ ANNEX B “Performance & Reliability” RESULTS SUMMARY 04/30/06 - 11/11/06
Parameter Measured
Average Range BNQ Class II Standard
NSF-40 Class I Standard
pH 7.3 7.1 to 7.5 n/a 6.0 to 9.0
CBOD5 3 mg/L <2 to 5 mg/L <25 mg/L <25 mg/L
TSS 4 mg/L <2 to 7 mg/L <30 mg/L <30 mg/L
BNQ ANNEX A RESULTS SUMMARY
09/23/07 to 03/15/08 (Resulted in BNQ Class III and Class V Certifications)
Loading Rate 2.4 gallons/day/foot of pipe + Stress Testing
Parameter Measured
Average Range BNQ Class III Standard NSF-40 Class I Standard
pH 7.6 7.0 to 8.2 n/a 6.0 to 9.0
CBOD5 2 mg/L <2 to 5 mg/L <15 mg/L <25 mg/L
TSS 2 mg/L <2 to 5 mg/L <15 mg/L <30 mg/L
Fecal Coliforms 2,900 CFU/100 mL 7 to 90,000 CFU/100 mL <50,000 CFU/100 mL n/a
Color None <1 color unit n/a None
Odor None “Non-offensive” n/a Non-Offensive
Oily Film/Foam None Not visually detected n/a Not visually detected
Noise None* None* n/a < 60 dbA
BNQ ANNEX B “Performance & Reliability” RESULTS SUMMARY 04/06/08 to 10/04/08
Parameter Measured
Average Range BNQ Class III Standard NSF-40 Class I Standard
pH 7.5 7.1 to 8.0 n/a 6.0 to 9.0
CBOD5 <2 mg/L <2 mg/L continuously <15 mg/L <25 mg/L
TSS <2 mg/L <2 to 4 mg/L <15 mg/L <30 mg/L
Fecal Coliforms 218 CFU/100 mL <2 to 30,000 CFU/100mL <50,000 CFU/100 mL n/a
- 3 -
The Cebedeau Bench Test conducted in Belgium utilized a European test protocol and reflected water use conditions more typical in European households. While the majority of PEI’s testing and field data is conducted at a higher loading rate, the organic load in this Cebedeau test was higher, since the wastewater supplied for this testing contained high levels of BOD and TSS (over 300 mg/L. of each).
CEBEDEAU BENCH TEST (per European Standard EN12566‐3 Appendix B) Lieze, Belgium 2009‐2010 (11 months)
RESULTS SUMMARY Full Size AES System, Loading Rate (constant) 1.97 gallons/day/ft. of pipe
Parameter Measured
Average Effluent Quality Produced
Range BNQ Class III Standard
NSF‐40 Class I
pH 7.4 6.9 to 7.8 n/a 6.0 to 9.0
COD 62.2 mg/L 32 to122 n/a 6.0 to 9.0
BOD5 10.1 mg/L <3 to 29 mg/L <15 mg/L <25 mg/L
TSS 12.2 mg/L 2 to 25 mg/L <15 mg/L <30 mg/L
Total Nitrogen 55.4 mg/L 27.5 to 123.5 mg/L n/a n/a
Kjeldahl Nitrogen 11.7 mg/L 2.2 to 40.2 mg/L n/a n/a
Ammonia Nitrogen 9.4 mg/L 1.1 to 35.7 mg/L n/a n/a
Nitrates 34.1 mg/L 16.1 to 54.4 mg/L n/a n/a
Nitrites .61 mg/L 0 to 1.60 mg/L n/a n/a
Total Phosphorus 4.3 mg/L 1.86 to 5.9 mg/L n/a n/a
Testing at MASSTC described below was conducted using a protocol in development in connection with the researcher’s work on a “gravelless” system certification standard for NSF. AES test cells obtained exceptional results using half as much sand (6 in.) below the pipes compared to BNQ testing.
Massachusetts Alternative Septic System Test Center (MASSTC), 2009-2011 AES RAW DATA SUMMARY
(Data obtained using 6 in. System Sand below AES pipes in test cell configuration)
Parameter Measured Effluent Quality (Geometric Means) BNQ Class III Standard
NSF-40 Class I Standard
BOD5 3.84 mg/L <15 mg/L <25 mg/L
TSS 4.75 mg/L <15 mg/L <30 mg/L
Earlier Testing: AES’ predecessor product, Enviro-Septic®, was tested in a variety of studies in order to confirm treated effluent quality without the need for pressure distribution, and in side‐by‐side comparisons with pipe & stone. The results of these tests are summarized in a research paper entitled “Treatment of Septic Tank Effluent: Comparison of Enviro‐Septic and Conventional Pipe and Stone Leaching Systems” dated March 1, 2004. In summary, ES was found to “treat wastewater better by promoting a more substantial aerobic microbial ecosystem than conventional systems.” This test was conducted at a higher loading rate than any other test, at 3.8 gallons per linear foot. These early studies were instrumental in the development of Advanced Enviro‐Septic®, featuring Bio‐Accelerator®, which enhances both the effectiveness and longevity of the technology. Field Testing & Performance:
Long‐term Performance in NH: ES and AES have been used extensively in New Hampshire since 1995, and NH’s approximately 80,000 installations account for nearly one-third of all ES/AES systems in use. William Evans, P.E., former administrator of the NH Subsurface Bureau and the first regulator to approve ES for use, was asked to comment on his experiences with the technology. He noted that AES and ES are used in 9 out of 10 onsite system plans that are submitted for approval, and that these systems have demonstrated both an extremely low failure
- 4 -
rate and exceptional longevity. Mr. Evans’ full report is available upon request or from our website; his conclusions are summarized below:
As former administrator of the Subsurface Systems Bureau of the New Hampshire Department of Environmental Services (NH DES), I was directly involved in the approval process, permitting, plan review and inspection of Enviro-Septic systems from 1995 through 2009 … During this time period, there were approximately 80,000 Enviro-Septic systems installed in New Hampshire; in fact, about 9 out of 10 plans for onsite wastewater treatment systems that come to the NH Subsurface Systems Bureau for approval today are for Enviro-Septic system designs. It has been my experience that when properly installed, Enviro-Septic systems have an extremely low failure rate (less than 1%) and, even after as much as 14 years in service, these systems are continuing to work as expected with only minimal required maintenance. These systems have consistently performed with a very high degree of reliability and have demonstrated superior durability and longevity. Based on the results of third-party testing (Stokes, Canada and BNQ/NSF), NH DES determined that the treatment capabilities of the Enviro-Septic system were so far superior to other alternatives that the Enviro-Septic system was approved for use with a smaller required separation distance from restrictive features than what has been granted for any other product approved for use in New Hampshire. … In my opinion, Enviro‐Septic’s superficial resemblance to leaching system products which only provide dispersal of septic tank effluent and rely on the soil to provide treatment has been misleading to some regulators, industry professionals and consumers. Enviro‐Septic has been proven to provide exceptional treatment (consistently meeting US EPA Tertiary standards or better) while also providing efficient dispersal via non‐mechanical processes. The fact that the system is releasing clean water from the pipes means that the system is not subject to progressive failure; the underlying soils are preserved, maintaining their ability to accept treated wastewater. This eliminates the need for a replacement area with the AES system, extends system longevity, and reduces any possibility of discharge or surfacing of inadequately treated wastewater….In conclusion, I feel Enviro‐Septic® technology is an effective and practical innovation in the field of onsite wastewater treatment technology….As a former regulator, I can attest to the fact that the availability of a smaller, less expensive, longer‐lasting onsite wastewater treatment system has encouraged the replacement of failed or failing systems that jeopardize the soils, surface waters and ground waters in their vicinity.
- W.M. Evans Engineering, June 1, 2010 BNQ Monitoring of Systems in Operation: As a condition of maintaining the BNQ Class II and III certifications, a percentage of all Canadian installations are subject to annual sampling and inspection. These AES systems in operation consistently demonstrate superior treatment results and minimal malfunctions of any kind; all AES systems being monitored in the field have achieved the required effluent quality to confirm secondary (Class II) and advanced secondary (Class III) treatment results.
BNQ 2009-2013 FIELD AUDITS RESULTS SUMMARY CLASS II SECONDARY LEVEL OF TREATMENT
Parameter Measured Average Effluent
Data Range BNQ Class II Standard
NSF-40 Class I Standard
EPA Tertiary Standard
CBOD (mg/L) < 7 < 2 to 21 < 25 < 25 10
TSS (mg/L) < 9 1 to 20 < 30 < 30 10
Fecal Coliforms (CFU/100 mL) n/a n/a n/a n/a 1,000
BNQ 2009-2013 FIELD AUDITS RESULTS SUMMARY CLASS III ADVANCED SECONDARY LEVEL OF TREATMENT
Parameter Measured Average Effluent
Data Range BNQ Class III Standard
NSF-40 Class I Standard
EPA Tertiary Standard
CBOD (mg/L) < 5 < 2 to 22 <15 <25 10
TSS (mg/L) < 7 < 1 to 28 <15 <30 10
Fecal Coliforms (CFU/100 mL) < 2,772 < 2 to 29,000 50,000 n/a 1,000
- 5 -
Ohio Experimental Concurrence Program: The State of Ohio has conducted an Experimental Concurrence program with Enviro-Septic® technology since 2008. In connection with the program’s sampling and monitoring requirements, ES systems were inspected at least monthly during their first winter (November to April) of operation, which constitutes their “wet” season. Jason Menchhofer, R.S. of the Van Wert County Department of Health compiled his collected data and shared his observations in an article entitled “Van Wert County’s Enviro‐Septic Experimental Program—The First Two Years.” Notably, Mr. Menchhofer observed no hydraulic loading concerns or surfacing, and lab analysis of collected samples from residential systems in use confirmed that ES effluent is “very clean” when released into surrounding soils. He also noted that contractors “appreciate the system’s simplicity and ease of installation and maintenance.”
Blodgett Landing Treatment Plant, Newbury, NH: Located in southwestern NH, this facility was designed to
deal with four problems plaguing the former plant: 1) freezing during winter operation; 2) cold weather affecting treatment levels; 3) increased de-nitrification requirements; and 4) handling the increased population of the community. The Treatment Plant is a Multi-Level
TM Enviro-Septic
® configuration with
recirculation for de-nitrification. This system is designed to handle an average daily flow of 50,000 GPD and fluctuations ranging from 2,500-88,000 GPD. There are four ES beds, each measuring 90 ft. long by 50 ft. wide, and consisting for 48 rows of ES pipe that are each 86 ft. long, making a total of 16,400 ft. of ES (approximately 3 gallons per linear foot per day). The wastewater goes through an initial screening process, and then proceeds to one of two Imhoff tanks where sedimentation and separation occurs. After the Imhoff tank, the effluent then proceeds to an equalization tank where it is dispersed into 1 of 4 treatment beds. The treatment beds are lined to capture the treated effluent. Once captured, the treated effluent is then pumped into a recycling tank. 50% of the treated effluent is then sent back through the Imhoff tanks via recirculation pumps for de-nitrification and the rest is dosed into the dispersal area.
Van Wert County, Ohio Experimental Concurrence RESULTS SUMMARY
Parameter Measured Average Range BNQ Class II Standard
BNQ Class III Standard
NSF-40 Class I Standard
E. Coli (CFU/100 mL) 379 < 10 to 8700 n/a n/a n/a
Fecal Coliforms (CFU/100 mL) 2056.71 < 10 to > 20000 n/a < 50,000 CFU/100 mL
n/a
BOD5 (mg/L) 9.36 < 2 to 48 < 25 mg/L < 15 mg/L < 25 mg/L
Total Suspended Solids (mg/L)
17.40 0.051 to 214 < 30 mg/L < 15 mg/L < 30 mg/L
Ammonia (mg/L) 0.22 < 0.05 to 0.94 n/a n/a n/a
Nitrate+Nitrite (mg/L) 12.27 0.1 to 24 n/a n/a n/a
Total Phosphorous (mg/L) 0.28 0.01 to 1.09 n/a n/a n/a
BLODGETT LANDING TREATMENT PLANT 5/15/13 – 8/11/14
LABORATORY RESULTS SUMMARY
Parameter Measured Avg. Effluent Results
Avg. Percentage Reduction
BNQ Class II Standard
BNQ Class III Standard
NSF-40 Class I Standard
EPA Tertiary Standard
TSS (mg/L) 5.04 95% < 30 < 15 < 30 10
Nitrite – N (mg/L) 0.5 3.57% n/a n/a n/a n/a
Nitrate – N (mg/L) 6.4 n/a n/a n/a n/a
Ammonia – N (mg/L) 0.43 97% n/a n/a n/a n/a
TKN (mg/L) 0.89 96% n/a n/a n/a n/a
Total Nitrogen (mg/L) 7.14 69% n/a n/a n/a n/a
Total Phosphorus (mg/L) 1.55 49% n/a n/a n/a n/a
BOD (mg/L) 6.0 93% < 25 < 15 < 25 10
pH (SU) 7.49 9.44% n/a n/a 6.0 to 9.0 n/a
Total Coliforms (MPN/100 mL) 14,739 100% n/a n/a n/a n/a
Fecal Coliforms (MPN/100 mL) 3,632 99.98% n/a 50,000 n/a 1,000
- 6 -
Hydrology, Groundwater Mounding & Load Bearing Analyses:
Groundwater Mounding Analysis: Cabral & Parent were retained by PEI to evaluate system bed sizing further utilizing SEEP/W 2007 software. The study evaluated groundwater mounding in a variety of soil conditions and for a variety of system dimensions, and examined the required depth of System Sand below the AES pipes to prevent groundwater mounding. Even employing a “worst case scenario” of continuous, full design loading, the study confirmed that PEI’s design recommendations regarding System Sand depth and bed sizing and dimensions incorporate a factor of safety, preventing groundwater mounding below the system.
Load Bearing Analysis: Gregsak Engineering, Inc. was retained by PEI to evaluate the pipe’s load bearing capabilities. This is important since in some jurisdictions AES systems are approved for installations under traffic bearing surfaces such as parking lots and driveways. Gregsak’s analysis, based on American Association of State Highway Transportation Officials (AASHTO) Guidelines, confirmed the pipe’s structural capability to withstand H10 and H20 loading in a subsurface application when installed with the minimum depth of cover material above the pipes recommended by PEI. (Refer to Gregsak Report and PEI’s H10/H20 Loading Guidelines.) Real World Use: While there is considerable variation in our approvals from one jurisdiction to the next, AES pipe requirements reflect both the loading rates utilized in our testing discussed above as well as our extensive field experience throughout 11 countries and 26 states. Based on this testing and field experience, PEI utilizes 50 ft. per bedroom or 3 gallons per linear foot. For example, the loading rate for our NSF/BNQ testing utilized 2.4 gallons per day per foot of pipe. For high strength effluent, PEI prefers to be consulted so we can work with designers to meet the needs of the system owner. System Sand bed size requirements reflect significant reductions in infiltrative surface area compared to conventional systems due to AES’s highly effective dispersal capabilities and ability to protect underlying soils from clogging. Bed sizing varies based on state regulations which typically take into consideration the soil’s perc rate. AES has also received depth reduction credits as a result of its proven treatment capabilities.
AES & ES Approvals
Please note that in most jurisdictions AES/ES approvals are based on design and installation criteria set forth in
state‐specific manuals that reflect the unique onsite wastewater regulations and soil conditions of that state.
While each state approval has its own requirements and limitations, in general AES technology is approved for use:
with reduced separation distance to restrictive features and groundwater;
with substantial field size reductions compared to conventional technology;
in soils with percolation rates up to 240 mpi;
in both commercial and residential applications;
in either bed or trench format;
in serial or parallel (d‐box) distribution;
with infiltration into native soil, or collected for alternative dispersal;
in subsurface or mound (fill) installations;
without the need for a reserved system replacement area;
without the need for pressure distribution;
without the need for effluent filters;
installed level or sloping up to 25% on sites with slopes up to 33%; and
with gravity distribution or using pumps to gain elevation.
- 7 -
AES/ES Approvals (as of August 2014):
AES featured in WERF Review of Advanced Technologies: In June, 2012, the Water Environment Research Foundation (WERF) published research conducted by Colorado State University (Lauwo, et. al.), A Review of Advanced Sewer System Designs and Technologies. This research paper presented a thorough overview of various types of septic systems, offering a list of advantages and disadvantages for each product. Note, however, that the document listed no disadvantages for Advanced Enviro-Septic® System technology. The researchers concluded that AES technology facilitates a “naturally balanced, secondary treatment that utilizes both aerobic and anaerobic bacteria….it more effectively reduces CBOD5, fecal coliforms and TSS when compared with conventional drainfield technology and recharges groundwater with better quality effluent….All of these advantages contribute to a cost‐effective system.”
United States:
Alabama Missouri
Alaska Montana
Arizona New Hampshire
Delaware New Jersey
Florida New York
Georgia North Carolina
Illinois North Dakota
Indiana Ohio
Iowa Rhode Island
Kansas Vermont
Maine Virginia
Massachusetts West Virginia
Michigan Wyoming
International: Canadian Provinces:
Algeria Alberta
Australia British Columbia
France Manitoba
Belgium New Brunswick
Libya Ontario
Mexico Quebec
Morocco Saskatchewan
New Zealand
Puerto Rico
Tunisia
- 8 -
PEI Technical Library and Resources: The majority of the documents referred to or referenced in this Technical
Bulletin are available for download from our website, www.PresbyEnvironmental.com. Some materials are made
available upon request by mail or email; if so, this is noted below. As always, our professional Technical Advisors
and Customer Service Representatives are available at 800‐473‐5298 to answer questions and provide further
information and guidance on the design, installation, use and maintenance of AES and ES technology.
References (Available for download from www.PresbyEnvironmental.com):
State Design & Installation Manuals
AES/ES Approval Letters
Owner’s Operation & Maintenance Guide
PEI’s H10/H20 Loading Guidelines
Jason Menchhoffer, R.S., Van Wert County Health Department Van Wert County’s Enviro‐Septic Experimental
Program—The First Two Years, Ohio Journal of Environmental Health, 2nd
Quarter, 2010. Also see Menchhoffer’s
slideshow presentation:
http://www.slideshare.net/jmenchhofer/richland‐co‐installer‐mtg‐12‐1010
William Evans, PE, (former New Hampshire Subsurface Bureau administrator) Opinion Letter dated 06/01/10
Test Data, Reports and Studies Cited (Available Upon Request from PEI):
NSF Report – Also available directly from NSF (www.nsf.org) or ([email protected]) NSF Manuals Excerpt BNQ
Reports Cebedeau Bench Test Report MASSTC Raw Data Report Research Paper, “Treatment of Septic Tank
Effluent: Comparison of Enviro‐Septic and Conventional Pipe and Stone Leaching Systems” March 1, 2004 Gillespie
Hydrology Study Cabral & Parent Groundwater Mounding Study Gregsak Engineering Opinion Letter re: H10/H20
Loading
Suggested Further Reading From the PEI Technical Bulletin Online Library:
Functional and Theoretical Overview (detailed functional description, design basis data, etc.)
AES Receives NSF 40 Class I Certification (more about NSF, Standard 40 and our test results)
PEI’s Training & Certification Programs (more about resources for designers & installers)
AES Achieves Even Distribution without Pressure Dosing (more about passive method of operation)
Surface Water Diversions, Grading & Hydraulic Loading (more about installation techniques)
Significant Differences between ES and GEO‐Flow (why AES technology is different from other LDGP systems)
Septic Tank Effluent Filters & Charcoal Filters Not Recommended (why AES/ES just don’t need them)
- 9 -
Designer & Installer Resources available from PEI AutoCAD System Design Library & LISP Routine Design Software ‐Training & Certification, Online & Live (Required in most states; some qualify for CEU’s)
Plan Review & Consultation ‐Troubleshooting Assistance
AES/ES Technology Patents (others pending):
Coupling, US Pat. No. 6,899,359, Canadian Pat. No. 2,359,255 End Cap, US Pat. No. 6,792,977, Canadian Pat. No. 2,365,453 ES Pipe, US Pat. No. 6,461,078, Canadian Pat. No. 2,300,535 AES Pipe, Pat. App. No. 60/683,994 Multi‐Layer Fabric, US Pat. No. 5,954,451, Canadian Pat. No. 2,185,087 Multi‐Level Leaching System, US Pat. No. 6,290,429, Canadian Pat. No. 2,286,995 Pipe Making Method, US Pat. 5,606,786, Canadian Pat. No. 2,187,126 Segmented Trench Apparatus, Pat. App. No. 61/547,321 Skimmer Tab Former, US Pat. No. 7,270,532, Canadian Pat. No. 2,415,194
Other PEI Wastewater Treatment Products:
De‐Nyte (passive de‐nitrification system) ‐US Pat. Nos. 7,288,190 and 7,713,414
Presby Maze (retains solids in septic tank) ‐US Pat. No. 5,429,752
Spec‐Check (on‐site device for analyzing aggregate) ‐US Pat. App. 13/367,968
© Presby Environmental, Inc., October 2013, Blodgett Landing, Newbury, NH 1
Newbury, NH - Blodgett Landing Wastewater Treatment Facility (WWTF) Summary
Site Location Map:
Latitude: 43.366676
Longitude:-72.039178
Design Criteria (Influent):
Average Daily Flow 50,690 GPD
Peak Daily Flow 88,000 GPD (measured)
Low Daily Flow (recorded in winter) 2,500 (measured)
Biological Oxygen Demand - 5 day consumption (BOD5) 300 mg/L
Total Suspended Solids (TSS) 343 mg/L
Potential Hydrogen (pH) 6.8 (measured)
Total Nitrogen 55 mg/L
Total Phosphorous 8 mg/L
Wastewater Strength Residential Only
Number of Units 150± Homes
Design Criteria (Effluent to Groundwater):
Biological Oxygen Demand - 5 day consumption (BOD5) Less than 30 mg/L
Total Suspended Solids (TSS) Less than 30 mg/L
Nitrates Less than 10 mg/L
Phosphorus Less than 4 mg/L
© Presby Environmental, Inc., October 2013, Blodgett Landing, Newbury, NH 2
Treatment and Disposal Process:
Notes:
Facility operates year round
Highest flow rates during summer months
Recycle rates increased during cool winter month to improve denitrification
All Presby fields active throughout year
Effluent Groundwater Disposal fields 8c and 8d for backup and surge loading
1) Influent
Screening
Influent from Pump
Stations (Raw Sewage)
3a) 34,000 gallon
Imhoff Tank
3b) 34,000 gallon
Imhoff Tank
2) Splitter Box
4) 25,000 gallon
Equalization Tank
5) Splitter Boxes
6a) Presby Field
Multi-Level™
Bed #1
6b) Presby Field
Multi-Level™
Bed #2
6c) Presby Field
Multi-Level™
Bed #3
6d) Presby Field
Multi-Level™
Bed #4
7) 5,000 gallon
Recycle Tank
8a) Primary
Effluent
Groundwater
Disposal
Sand Bed #1
8b) Primary
Effluent
Groundwater
Disposal
Sand Bed #2
8c) Alternate
Effluent
Groundwater
Disposal
Sand Bed #3
8d) Alternate
Effluent
Groundwater
Disposal
Sand Bed #4
Figure 1 - Treatment and Disposal Process
© Presby Environmental, Inc., October 2013, Blodgett Landing, Newbury, NH 3
Item Descriptions:
1. Automatic rotary drum screen and bagging system including a by-pass channel with
manual bar rack
2. Splitter box to control flow to Imhoff tanks
3. 34,000 gallon Imhoff tanks for sedimentation (see figure 2)
4. 25,000 gallon concrete Equalization tank with dosing pump station
a. Two 350 GPM variable speed (variable frequency drive) 3 hp motors
b. Dosing volume a function of daily flow
c. Dosing volume adjusted manually by operator
5. Splitter box for Presby fields
a. Flow divided to (4) separate distribution boxes
b. Distribution boxes divide flow within each Presby field
6. Four gravity fed Presby fields for wastewater treatment (always in operation)
a. Each field designed using Presby's patented Multi-Level™ configuration
b. Two levels of Enviro-Septic® pipe
Figure 2 - Section View of Imhoff Tanks
© Presby Environmental, Inc., October 2013, Blodgett Landing, Newbury, NH 4
c. (48) rows - (24) rows in upper level and (24) rows in lower level
d. Each row 85 ft long for a total of 4,080 ft of Enviro-Septic® pipe per field
e. Differential venting used to maintain aerobic environment inside pipe
f. Enviro-Septic® pipes surrounded with ASTM C-33 sand
g. Field sides and bottom line to capture treated liquid
h. Under drains collect liquid and deliver to recycle tank
i. No required maintenance under normal conditions
j. See figure 3 for schematic of flow to Presby fields
k. See figure 4 for section view of Presby field
Figure 3 - Schematic of Flow to Fields
Figure 4 - Presby Bed Section View
© Presby Environmental, Inc., October 2013, Blodgett Landing, Newbury, NH 5
7. 5,000 gallon recycle tank
a. Volume recycled to Imhoff tanks at a ratio of 0.5:1 to 5:1
b. Ideal monthly average ratio is 3:1 or above
c. Recycle ratio increases depending on level of denitrification needed and the
ambient temperatures (lower temperatures reduce biological activity)
d. Liquid pumped continuously to bottom of Imhoff tanks (anaerobic zone with
carbon source)
e. Recycle pump(s) manually set by operator to deal with fluctuating daily flows
f. Example of how to calculate recycle ration:
1.Pump running 24 hours a day at 50 GPM = 72,000 GPD
2.Daily flow from community = 18,000 gallons for that 24 hour period
3.72,000 gal ÷ 18,000 gal = 4:1 recycle ratio
g. When the water level in the tank reaches a set level, a pump will discharge the
contents to one of the two effluent groundwater disposal fields
8. Effluent Groundwater Disposal Fields
a. Each sand bed is approximately 10,000 sq ft in size
b. Two fields will alternately accept treated wastewater from the recycle pump(s)
c. Effluent is pumped to a perforated pipe network laying on top of the sand beds
d. Two additional fields are held in reserve
See Appendix A for test data
© Presby Environmental, Inc., October 2013, Blodgett Landing, Newbury, NH 6
Appendix A
©
Pre
sby E
nvir
onm
enta
l, I
nc.
, O
ctob
er 2
013,
Blo
dget
t L
andin
g, N
ewbury
, N
H 7
0
20
40
60
80
10
0
12
0
14
0
16
0
18
0
20
0
22
0
24
0
26
0
28
0
30
0
mg/L
Blo
dge
tt L
and
ing
-B
OD
5 m
g/L
©
Pre
sby E
nvir
onm
enta
l, I
nc.
, O
ctob
er 2
013,
Blo
dget
t L
andin
g, N
ewbury
, N
H 8
0
20
40
60
80
10
0
12
0
14
0
16
0
18
0
20
0
22
0
24
0
26
0
28
0
30
0
mg/L
Blo
dg
ett
Lan
din
g -
To
tal S
usp
en
ded
So
lid
s (
TS
S)
©
Pre
sby E
nvir
onm
enta
l, I
nc.
, O
ctob
er 2
013,
Blo
dget
t L
andin
g, N
ewbury
, N
H 9
1
10
10
0
1,0
00
10
,00
0
10
0,0
00
1,0
00
,000
10
,00
0,0
00
10
0,0
00,0
00
1,0
00
,000
,00
0
mg/L
Blo
dg
ett
Lan
din
g -
Fecal
Co
lifo
rm
©
Pre
sby E
nvir
onm
enta
l, I
nc.
, O
ctob
er 2
013,
Blo
dget
t L
andin
g, N
ewbury
, N
H 1
0
0
5,0
00
10
,00
0
15
,00
0
20
,00
0
25
,00
0
30
,00
0
35
,00
0
40
,00
0
12
34
56
78
910
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
GPD
Blo
dg
ett
Lan
din
g -
2012 D
ail
y F
low
GP
DJA
NG
PD
MA
RG
PD
AU
GG
PD
OC
T
Date
High
Hi
st.
Tem
p.
(°F)
Low
Hi
st.
Tem
p.
(°F)
TSS
- In
fluen
tTS
S -
Efflu
ent
Nitr
ite -
Influ
ent
Nitr
ite -
Efflu
ent
Nitr
ate-
In
fluen
tN
itrat
e -
Efflu
ent
Amm
onia
-
Influ
ent
Amm
onia
- Ef
fluen
tTK
N -
Influ
ent
TKN
- Ef
fluen
t
Tota
l N
itrog
en -
Influ
ent
Tota
l N
itrog
en -
Efflu
ent
Tota
l Ph
osph
. -
Influ
ent
Tota
l Ph
osph
. -
Efflu
ent
BOD
- In
fluen
tBO
D -
Efflu
ent
pH -
Influ
ent
pH -
Efflu
ent
Tot
al C
olifo
rm -
Influ
ent
Tot
al C
olifo
rm -
Efflu
ent
Fec
al C
olifo
rm -
Influ
ent
Feca
l Co
lifor
m -
Efflu
ent
1/4/
2012
0.01
2.8
2.2
0.02
Spor
adic
1/12
/201
20.
011.
962.
21.
02Sp
orad
ic1/
16/2
012
0.01
2.1
181.
07Sp
orad
ic1/
23/2
012
0.01
1.72
161.
19Sp
orad
ic1/
29/2
012
0.01
1.72
190.
09Sp
orad
ic3/
8/20
120.
012.
218
0.07
Spor
adic
3/15
/201
20.
011.
921
0.07
Spor
adic
3/21
/201
20.
011.
921
0.07
Spor
adic
3/28
/201
20.
011.
916
0.64
Spor
adic
3/31
/201
278
512
13Sp
orad
ic8/
1/20
120.
010.
8422
2.4
Spor
adic
8/7/
2012
0.01
0.96
222.
2Sp
orad
ic8/
17/2
012
420.
920.
0118
2.8
500
Spor
adic
8/24
/201
21.
52.
2Sp
orad
ic8/
29/2
012
1.1
0.01
212
Spor
adic
10/4
/201
20.
010.
6616
0.12
Spor
adic
10/1
2/20
120.
010.
6618
0.04
Spor
adic
10/2
2/20
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2
Efflu
ent
Test
ing
Para
met
ers
TSS
Nitr
iteN
itrat
eAm
mon
iaTK
NTo
tal
Nitr
ogen
Phos
phor
usBO
DpH
Tot
al C
olifo
rm
Fec
al C
olifo
rm
Avg.
Tes
t Re
sults
5.04
0.50
6.40
0.43
0.89
7.14
1.55
6.00
7.49
14,7
39
3,63
2
Influ
ent
Test
ing
Para
met
ers
TSS
Nitr
iteN
itrat
eAm
mon
iaTK
NTo
tal
Nitr
ogen
Phos
phor
usBO
DpH
Tot
al C
olifo
rm
Fec
al C
olifo
rm
Avg.
Tes
t Re
sults
102.
220.
521.
1315
.53
22.1
223
.05
3.05
91.3
36.
8553
8,25
9,03
9
16,0
47,4
33
Perc
enta
ge C
hang
e
Test
ing
Para
met
ers
TSS
Nitr
iteN
itrat
eAm
mon
iaTK
NTo
tal
Nitr
ogen
Phos
phor
usBO
DpH
Tot
al C
olifo
rm
Fec
al C
olifo
rm
Avg.
%
Redu
ctio
n-9
5%-3
.57%
469%
-97%
-96%
-69%
-49%
-93%
9.44
%-1
00%
-99.
98%
-20020406080100
His
toric
al Te
mpe
ratu
re
High
Hist
. Tem
p. (°
F)
Low
Hist
. Tem
p. (°
F)
Avg.
Hig
h: 5
2.67
°F
Avg.
Low
: 36.
20°F
05101520253035404550
TKN
TKN
- In
fluen
t
TKN
- Ef
fluen
t
Avg.
Influ
ent:
22.1
2 Av
g. E
fflue
nt: 0
.89
Avg.
% R
educ
tion:
96%
0102030405060
Tota
l Nitr
ogen
Tota
l Nitr
ogen
- In
fluen
t
Tota
l Nitr
ogen
- Ef
fluen
t
Avg.
Influ
ent:
23.0
5 Av
g. E
fflue
nt: 7
.14
Avg.
% R
educ
tion:
69%
050100
150
200
250
300
BOD
BOD
- Inf
luen
t
BOD
- Effl
uent
Avg.
Influ
ent:
91.3
3 Av
g. E
fflue
nt: 6
.00
Avg.
% R
educ
tion:
93%
0
100
200
300
400
500
600
700
800
TSS
TSS
- Inf
luen
t
TSS
- Effl
uent
Avg.
Influ
ent:
102.
22
Avg.
Effl
uent
: 5.0
4 Av
g. %
Red
uctio
n: 9
5%
0510152025303540
Amm
onia
Amm
onia
- In
fluen
t
Amm
onia
- Ef
fluen
t
Avg.
Influ
ent:
15.
53
Avg.
Effl
uent
: 0.4
3 Av
g. %
Red
uctio
n: 9
7%
0123456789
Tota
l Pho
spho
rous
Tota
l Pho
sph.
- In
fluen
t
Tota
l Pho
sph.
- Ef
fluen
t
Avg.
Influ
ent:
3.0
5 Av
g. E
fflue
nt: 1
.55
Avg.
% R
educ
tion:
49%
-
5,0
00,0
00
10,
000,
000
15,
000,
000
20,
000,
000
25,
000,
000
30,
000,
000
Feca
l Col
iform
Feca
l Col
iform
- In
fluen
t
Feca
l Col
iform
- Ef
fluen
t
Avg.
Influ
ent:
16,
047,
433
Avg.
Effl
uent
: 3,6
32
Avg.
% R
educ
tion:
99.
98%
* Fo
r eas
ier v
iew
ing
of d
ata,
two
influ
ent r
esul
ts
at 5
00,0
00,0
00 a
nd 1
10,0
00,0
00 a
re n
ot sh
own.
-
200
,000
,000
400
,000
,000
600
,000
,000
800
,000
,000
1,0
00,0
00,0
00
1,2
00,0
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DateHigh Hist. Temp. (°F)
Low Hist. Temp. (°F) TSS Nitrite-N Nitrate-N Ammonia-N TKN Total Nitrogen Total Phosphorus-P BOD pH Total Coliform Fecal Coliform
5/15/2013 62 33 190 <0.5 1.1 11 17 18.1 2.8 180 6.8 3,000,000 800,000
5/29/2013 61 49 17 <0.5 1.7 7.4 11 12.7 1.9 15 8.8 e16000000 5,000,000
6/5/2013 72 48 9 <0.5 2.5 3.7 4.9 7.4 2.1 8 6.6 3,000,000 350,000
6/13/2013 64 50 60 <0.5 <0.6 8.7 16 16 1.8 62 6.5 16,000,000 3,000,000
6/19/2013 69 48 220 <0.5 1.8 7.3 15 16.6 3.2 51 6.7 3,000,000 300,000
6/26/2013 74 64 81 <0.5 <0.5 17 22 22 2.8 61 7 500,000,000 2,400,000
7/3/2013 85 60 57 <0.5 <0.5 12 22 22 2.2 43 6.5 2,400,000 1,300,000
7/10/2013 77 64 100 <0.5 <0.5 18 26 26 3.4 100 6.9 30,000,000 5,000,000
7/17/2013 90 68 130 <0.5 <0.5 24 37 37 4.7 170 6.9 ≥1600000000 500,000,000
8/7/2013 79 57 120 <0.5 <0.5 30 45 45 5.4 150 7 22,000,000,000 110,000,000
8/14/2013 66 53 140 <0.5 <0.5 27 31 31 4.1 120 7.1 130,000,000 30,000,000
8/21/2013 83 64 90 <0.5 4.5 18 27 31.5 3.8 96 6.6 17,000,000 17,000,000
8/28/2013 83 62 190 <0.5 <0.5 24 25 25 3.9 180 6.5 28,000,000 7,000,000
9/4/2013 74 58 130 1.5 2.8 7.7 14 18.1 3 88 6.6 300,000,000 22,000,000
9/9/2013 67 44 270 <0.5 0.5 28 43 43.5 6 250 6.8 900,000 220,000
9/18/2013 50 41 45 <0.5 1.3 16 23 24.5 3.2 61 6.7 1,600,000,000 9,000,000
9/25/2013 62 48 45 <0.5 1.8 2.8 7 8.8 1.1 30 6.7 28,000,000 5,000,000
10/3/2013 71 53 33 <0.5 1.2 3.5 6 7.2 1.1 27 6.9 3,000,000 130,000
10/10/2013 61 39 170 <0.5 <0.5 38 45 45 6.6 150 6.9 240,000,000 13,000,000
10/16/2013 57 49 170 <0.5 <0.5 30 40 40 5.5 280 6.7 17,000,000 1,100,000
10/23/2013 50 36 720 <0.5 2.1 16 28 30.1 3.9 190 6.8 11,000,000 1,700,000
10/30/2013 44 31 78 <0.5 <0.5 36 42 42 5.7 180 7 500,000,000 5,000,000
11/6/2013 57 36 69 <0.5 4.1 15 21 25.1 3.3 77 7.1 11,000,000 500,000
11/13/2013 28 18 110 <0.5 4.2 17 23 27.2 3.3 87 7.3 50,000,000 800,000
11/21/2013 44 19 96 <0.5 <0.5 7.9 13 13 1.3 <30 6.7 5,000,000 220,000
11/27/2013 47 29 70 <0.5 <0.5 23 36 36 6.1 160 5.6 11,000,000 8,000,000
12/4/2013 38 27 72 <0.5 <0.5 29 36 36 4.6 140 6.8 16,000,000 1,700,000
12/18/2013 26 9 240 <0.5 3.2 14 20 23.2 3.2 110 6.9 3,000,000 1,400,000
12/26/2013 26 12 170 <0.5 2.8 24 34 36.8 4.4 190 6.9 17,000,000 7,000,000
1/2/2014 10 -3 89 <0.5 <0.5 36 38 38 4.8 200 6.9 14,000,000 11,000,000
1/9/2014 20 10 23 <0.5 2 8.1 13 15 1.8 37 7.1
1/15/2014 47 31 34 <0.5 2.6 2.2 5 7.6 1.2 19 6.9 700,000 30,000
1/22/2014 9 -8 34 <0.5 <0.5 7 10 15 15 1.8 55
1/29/2014 19 2 45 <0.5 0.6 4.8 7 7.6 1 27 6.7 1,281,000 29,090
2/12/2014 29 -2 52 <0.5 0.6 21 31 31.6 3.6 120 6.9 2,300,000 800,000
2/19/2014 31 17 75 <0.5 <0.5 24 37 37 4.2 120 7.1 30000000 5000000
2/26/2014 20 6 340 <0.5 <0.5 5.5 23 23 2.6 220 6.9
3/5/2014 20 7 25 <0.5 <0.5 15 20 20 2.3 40 7 1,300,000 300,000
3/13/2014 21 6 20 <0.5 1.9 3.2 4.7 6.6 0.5 12 6.7 3,000,000 60,000
3/19/2014 37 18 27 <0.5 <0.5 8.7 12 12 1.4 27 6.9 230,000 230,000
3/26/2014 26 15 95 <0.5 0.7 10 15 18.7 1.9 66 6.3 2400000 230000
4/3/2014 45 32 60 <0.5 0.6 6.2 10 10.6 1 28 7 1,300,000 140,000
4/9/2014 45 32 34 <0.5 <0.5 2.3 6 6 0.7 32 6.7 2,200,000 80,000
4/16/2014 34 19 21 <0.5 0.6 3 11 11.6 0.9 24 6.5 1,300,000 1,300,000
4/23/2014 53 39 29 <0.5 0.5 3.6 9 9.5 2.2 14 6.6 1,400,000 300,000
4/30/2014 39 35 12 <0.5 <0.5 1.8 2.8 2.8 0.27 6 7 1,100,000 200,000
5/7/2014 45 44 34 <0.5 <0.5 8.7 13 13 1.4 35 6.9 3,000,000 300,000
5/14/2014 78 44 57 <0.5 <0.5 22 28 28 3.1 65 7.1 5,000,000 1,300,000
5/21/2014 74 45 81 <0.5 <0.5 8.2 12 12 1.5 43 6.9 2,400,000 2,400,000
6/5/2014 68 55 26 <0.5 <0.5 9.4 11 11 1.4 36 6.5 17000000 800000
6/11/2014 67 52 130 <0.5 <0.5 21 25 25 3.5 96 6.6 30,000,000 5,000,000
6/18/2014 75 65 75 <0.5 <0.5 18 23 23 2.9 84 6.9 50,000,000 3,000,000
7/14/2014 82 68 110 <0.5 <0.5 33 50 50 8.4 120 7.3 70,000,000 22,000,000
8/11/2014 83 57 100 0.5 <0.5 37 43 43.5 5.8 120 7 50,000,000 5,000,000
DateHigh Hist. Temp. (°F)
Low Hist. Temp. (°F) TSS Nitrite-N Nitrate-N Ammonia-N TKN Total Nitrogen
Total Phosphorus-P BOD pH
Total Coliform
Fecal Coliform
5/15/2014 62 33 <5 <0.5 5 <0.05 <0.5 5 1.8 <6 6.5 410.8 70
5/29/2013 61 49 <5 <0.5 5.8 0.39 0.8 5.4 1.9 <6 6.5 1600 1600
6/5/2013 72 48 <5 <0.5 4.2 <0.05 <.05 4.2 2.1 <6 6.6 280 170
6/13/2013 64 50 <5 <0.5 2.7 <0.05 0.6 3.3 1.9 <6 6.5 80 22
6/19/2013 69 48 <6 <0.5 3.8 0.15 <0.5 3.95 1.9 <6 6.5 1600 130
6/26/2013 74 64 <5 <0.5 3.5 0.11 <0.5 3.6 2.2 <6 6.5 500 50
7/3/2013 85 60 <5 <0.5 3.8 0.75 1.8 5.6 2.5 <6 6.2 ≥1600 ≥1600
7/10/2013 77 64 6 <0.5 5.6 3.9 5.3 10.9 4.1 <6 6.5 ≥16000 9000
7/17/2013 90 68 <5 <0.5 11 3 2.7 13.7 2.5 <6 5.4 ≥160000 ≥160000
8/7/2013 79 57 <5 <0.5 10 2.1 1.8 12.1 1.6 <6 5.3 500000 300
8/14/2013 66 53 <5 <0.5 9.6 2.3 1.2 11.9 1.5 <6 6.4 5000 1700
8/21/2013 83 64 <5 <0.5 10 1.6 0.8 11.6 1.7 <6 6.2 11000 1100
8/28/2013 83 62 <5 <0.5 9.1 0.76 <0.5 9.86 1.6 <6 6.3 17000 2600
9/4/2013 74 58 <5 <0.5 9.4 1.1 1.8 10.2 1.8 <6 6.4 11000 1100
9/9/2013 67 44 <5 <0.5 5.7 0.13 1.5 7.2 1.6 <6 6.6 7000 300
9/18/2013 50 41 <5 <0.5 4.6 <0.05 <0.5 4.6 1.4 <6 6.6 70 <2
9/25/2013 62 48 <5 <0.5 4.8 <0.05 1.6 6.4 1.2 <6 6.7 1600 4
10/3/2013 71 53 <5 <0.5 4.9 <0.05 <0.5 4.9 1.3 <6 6.9 ≥1600 <2
10/10/2013 61 39 <5 <0.5 5.2 <0.05 <0.5 5.2 1.2 <6 7 240 4
10/16/2013 57 49 <5 <0.5 7 <0.05 <0.5 7 1.3 <6 6.7 900 2
10/23/2013 50 36 <5 <0.5 7.2 <0.05 0.5 7.7 1.2 <6 6.9 1600 <2
10/30/2013 44 31 <5 <0.5 7.2 <0.05 <0.5 7.2 1.2 <6 7.1 170 2
11/6/2013 57 36 <5 <0.5 7.2 <0.05 <0.5 7.2 1.1 <6 7.3 500 <2
11/13/2013 28 18 <5 <0.5 8.3 <0.05 <0.5 8.3 1.2 <6 7.6 300 4
11/21/2013 44 19 <5 <0.5 7.3 <0.05 2 9.3 1.3 <6 7.5 <1 <1
11/27/2013 47 29 <5 <0.5 7.2 <0.05 <0.5 7.2 1.2 <6 7.4 <10.6 <1
12/4/2013 38 27 <5 <0.5 10 0.05 <0.5 10 1.3 6 7 185 34.5
12/18/2013 26 9 <5 <0.5 9.6 <.05 <0.5 9.6 1.2 <6 7.3 39.9 5.2
12/26/2013 26 12 5 <0.5 11 0.1 <0.5 11 1.3 <6 6.8 1299.7 125.9
1/2/2014 10 -3 <5 <0.5 11 1.4 1.3 12.4 1.4 <6 5.8 >2400 >2400
1/9/2014 20 10 <5 <0.5 8.9 0.26 <0.5 8.9 1.6 <6 6.7
1/15/2014 47 31 <5 <0.5 7.2 0.05 0.7 7.9 1.5 <6 6.6 290.9 62
1/22/2014 9 -8 <5 <0.5 4.7 0.29 <0.5 4.7 1.5 <6 6.8
1/29/2014 19 2 <5 <0.5 9.6 0.08 0.8 10.4 1.6 <6 6.7 231 231
2/12/2014 29 -2 <5 <0.5 8.4 0.09 <0.5 8.4 1.2 <6 6.5 461.1 59.4
2/19/2014 31 17 <5 <0.5 5.3 0.36 0.7 9.6 1.2 <6 6.6 2413 648.9
2/26/2014 20 6 <5 <0.5 9.8 0.34 0.5 10.3 1.4 <6 6.7 >2400 185
3/5/2014 20 7 <5 <0.5 6.8 0.12 0.8 7.7 1 <6 5.5 1986.3 43.2
3/13/2014 21 6 <5 <0.5 6.2 0.24 0.6 6.6 0.9 <6 6.5 2420 548
3/19/2014 37 18 <5 <0.5 6.9 0.12 0.7 7.6 1.1 <6 6.5 488.4 81.6
3/26/2014 26 15 <5 <0.5 7.6 0.17 <0.5 7.8 1.5 <6 6.4 1414 111.9
4/3/2014 45 32 <5 <0.5 2 0.06 0.5 2.5 0.6 <6 6.5 770.1 101.2
4/9/2014 45 32 <5 <0.5 1.6 0.14 0.6 2.2 1.3 <6 6.3 1046 275.5
4/16/2014 34 19 <5 <0.5 2.4 <0.05 <0.5 2.4 0.81 <6 6.4 816.4 178.6
4/23/2014 53 39 <5 <0.5 <0.5 <0.05 <0.5 <0.5 0.6 <6 6.4 648.8 138.6
4/30/2014 39 35 <5 <0.5 4.6 <0.05 <0.5 4.6 1.1 <6 6.8 133.3 56.3
5/7/2014 45 44 <5 <0.5 5.2 <0.05 <0.5 5.2 1.5 <6 6.4 37.3 8.4
5/14/2014 78 44 <5 <0.5 5 <0.05 <0.5 5 1.3 <6 6.3 76.7 13.2
5/21/2014 74 45 <5 <0.5 4.2 <0.05 1.3 5.5 1.4 <6 6.4 81.3 53.7
6/5/2014 68 55 <5 <0.5 4.3 <0.05 <0.5 4.3 1.6 <6 6.4 1553.1 435.2
6/11/2014 67 52 <5 <0.5 4.5 <0.05 <0.5 4.5 1.7 <6 56.1 122.3 13.5
6/18/2014 75 65 <5 <0.5 4.4 <0.05 0.7 5.1 2 <6 6.9 235.9 2
7/14/2014 82 68 <5 <0.5 5.9 1.4 2.8 8.7 3.3 <6 6.6 >2400 >2400
8/11/2014 83 57 <5 <0.5 8 0.5 <0.5 8.5 2.7 <6 6.6 >2419 866.4
DateHigh Hist. Temp. (°F)
Low Hist. Temp. (°F) TSS Nitrite-N Nitrate-N Ammonia-N TKN
Total Nitrogen
Total Phosphorus-P BOD pH Total Coliform Fecal Coliform
5/15/2014 62 33 5 0.5 5 0.05 0.5 5 1.8 6 6.5 410.8 70
5/29/2013 61 49 5 0.5 5.8 0.39 0.8 5.4 1.9 6 6.5 1600 1600
6/5/2013 72 48 5 0.5 4.2 0.05 0.05 4.2 2.1 6 6.6 280 170
6/13/2013 64 50 5 0.5 2.7 0.05 0.6 3.3 1.9 6 6.5 80 22
6/19/2013 69 48 6 0.5 3.8 0.15 0.5 3.95 1.9 6 6.5 1600 130
6/26/2013 74 64 5 0.5 3.5 0.11 0.5 3.6 2.2 6 6.5 500 50
7/3/2013 85 60 5 0.5 3.8 0.75 1.8 5.6 2.5 6 6.2 1600 1600
7/10/2013 77 64 6 0.5 5.6 3.9 5.3 10.9 4.1 6 6.5 16000 9000
7/17/2013 90 68 5 0.5 11 3 2.7 13.7 2.5 6 5.4 160000 160000
8/7/2013 79 57 5 0.5 10 2.1 1.8 12.1 1.6 6 5.3 500000 300
8/14/2013 66 53 5 0.5 9.6 2.3 1.2 11.9 1.5 6 6.4 5000 1700
8/21/2013 83 64 5 0.5 10 1.6 0.8 11.6 1.7 6 6.2 11000 1100
8/28/2013 83 62 5 0.5 9.1 0.76 0.5 9.86 1.6 6 6.3 17000 2600
9/4/2013 74 58 5 0.5 9.4 1.1 1.8 10.2 1.8 6 6.4 11000 1100
9/9/2013 67 44 5 0.5 5.7 0.13 1.5 7.2 1.6 6 6.6 7000 300
9/18/2013 50 41 5 0.5 4.6 0.05 0.5 4.6 1.4 6 6.6 70 2
9/25/2013 62 48 5 0.5 4.8 0.05 1.6 6.4 1.2 6 6.7 1600 4
10/3/2013 71 53 5 0.5 4.9 0.05 0.5 4.9 1.3 6 6.9 1600 2
10/10/2013 61 39 5 0.5 5.2 0.05 0.5 5.2 1.2 6 7 240 4
10/16/2013 57 49 5 0.5 7 0.05 0.5 7 1.3 6 6.7 900 2
10/23/2013 50 36 5 0.5 7.2 0.05 0.5 7.7 1.2 6 6.9 1600 2
10/30/2013 44 31 5 0.5 7.2 0.05 0.5 7.2 1.2 6 7.1 170 2
11/6/2013 57 36 5 0.5 7.2 0.05 0.5 7.2 1.1 6 7.3 500 2
11/13/2013 28 18 5 0.5 8.3 0.05 0.5 8.3 1.2 6 7.6 300 4
11/21/2013 44 19 5 0.5 7.3 0.05 2 9.3 1.3 6 7.5 1 1
11/27/2013 47 29 5 0.5 7.2 0.05 0.5 7.2 1.2 6 7.4 10.6 1
12/4/2013 38 27 5 0.5 10 0.05 0.5 10 1.3 6 7 185 34.5
12/18/2013 26 9 5 0.5 9.6 0.05 0.5 9.6 1.2 6 7.3 39.9 5.2
12/26/2013 26 12 5 0.5 11 0.1 0.5 11 1.3 6 6.8 1299.7 125.9
1/2/2014 10 -3 5 0.5 11 1.4 1.3 12.4 1.4 6 5.8 2400 2400
1/9/2014 20 10 5 0.5 8.9 0.26 0.5 8.9 1.6 6 6.7
1/15/2014 47 31 5 0.5 7.2 0.05 0.7 7.9 1.5 6 6.6 290.9 62
1/22/2014 9 -8 5 0.5 4.7 0.29 0.5 4.7 1.5 6 6.8
1/29/2014 19 2 5 0.5 9.6 0.08 0.8 10.4 1.6 6 6.7 231 231
2/12/2014 29 -2 5 0.5 8.4 0.09 0.5 8.4 1.2 6 6.5 461.1 59.4
2/19/2014 31 17 5 0.5 5.3 0.36 0.7 9.6 1.2 6 6.6 2413 648.9
2/26/2014 20 6 5 0.5 9.8 0.34 0.5 10.3 1.4 6 6.7 2400 185
3/5/2014 20 7 5 0.5 6.8 0.12 0.8 7.7 1 6 5.5 1986.3 43.2
3/13/2014 21 6 5 0.5 6.2 0.24 0.6 6.6 0.9 6 6.5 2420 548
3/19/2014 37 18 5 0.5 6.9 0.12 0.7 7.6 1.1 6 6.5 488.4 81.6
3/26/2014 26 15 5 0.5 7.6 0.17 0.5 7.8 1.5 6 6.4 1414 111.9
4/3/2014 45 32 5 0.5 2 0.06 0.5 2.5 0.6 6 6.5 770.1 101.2
4/9/2014 45 32 5 0.5 1.6 0.14 0.6 2.2 1.3 6 6.3 1046 275.5
4/16/2014 34 19 5 0.5 2.4 0.05 0.5 2.4 0.81 6 6.4 816.4 178.6
4/23/2014 53 39 5 0.5 0.5 0.05 0.5 0.5 0.6 6 6.4 648.8 138.6
4/30/2014 39 35 5 0.5 4.6 0.05 0.5 4.6 1.1 6 6.8 133.3 56.3
5/7/2014 45 44 5 0.5 5.2 0.05 0.5 5.2 1.5 6 6.4 37.3 8.4
5/14/2014 78 44 5 0.5 5 0.05 0.5 5 1.3 6 6.3 76.7 13.2
5/21/2014 74 45 5 0.5 4.2 0.05 1.3 5.5 1.4 6 6.4 81.3 53.7
6/5/2014 68 55 5 0.5 4.3 0.05 0.5 4.3 1.6 6 6.4 1553.1 435.2
6/11/2014 67 52 5 0.5 4.5 0.05 0.5 4.5 1.7 6 56.1 122.3 13.5
6/18/2014 75 65 5 0.5 4.4 0.05 0.7 5.1 2 6 6.9 235.9 2
7/14/2014 82 68 5 0.5 5.9 1.4 2.8 8.7 3.3 6 6.6 2400 2400
8/11/2014 83 57 5 0.5 8 0.5 0.5 8.5 2.7 6 6.6 2419 866.4
AVERAGES 52.67 36.20 5.04 0.50 6.40 0.43 0.89 7.14 1.55 6.00 7.49 14,739 3,632
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